Solar Eclipse Prime Page

Annular Solar Eclipse of 1191 Jun 23

Fred Espenak

Introduction


The Annular Solar Eclipse of 1191 Jun 23 is visible from the geographic regions shown on the map to the right. Click on the map to enlarge it. For an explanation of the features appearing in the map, see Key to Solar Eclipse Maps.

The instant of greatest eclipse takes place on 1191 Jun 23 at 11:49:21 TD (11:36:48 UT1). This is 2.7 days before the Moon reaches apogee. During the eclipse, the Sun is in the constellation Gemini. The synodic month in which the eclipse takes place has a Brown Lunation Number of -9047.

The eclipse belongs to Saros 104 and is number 41 of 70 eclipses in the series. All eclipses in this series occur at the Moon’s descending node. The Moon moves northward with respect to the node with each succeeding eclipse in the series and gamma increases.

The annular solar eclipse of 1191 Jun 23 is followed two weeks later by a partial lunar eclipse on 1191 Jul 08.

These eclipses all take place during a single eclipse season.

The eclipse predictions are given in both Terrestrial Dynamical Time (TD) and Universal Time (UT1). The parameter ΔT is used to convert between these two times (i.e., UT1 = TD - ΔT). ΔT has a value of 752.6 seconds for this eclipse.

The following links provide maps and data for the eclipse.

The tables below contain detailed predictions and additional information on the Annular Solar Eclipse of 1191 Jun 23 .


Eclipse Data: Annular Solar Eclipse of 1191 Jun 23

Eclipse Characteristics
Parameter Value
Eclipse Magnitude 0.95386
Eclipse Obscuration 0.90984
Gamma 0.48324
Conjunction Times
Event Calendar Date & Time Julian Date
Greatest Eclipse 1191 Jun 23 at 11:49:21.0 TD (11:36:48.4 UT1) 2156243.983894
Ecliptic Conjunction 1191 Jun 23 at 11:43:39.6 TD (11:31:07.0 UT1) 2156243.979942
Equatorial Conjunction 1191 Jun 23 at 11:40:21.6 TD (11:27:49.0 UT1) 2156243.977651
Geocentric Coordinates of Sun and Moon
1191 Jun 23 at 11:49:21.0 TD (11:36:48.4 UT1)
Coordinate Sun Moon
Right Ascension06h32m51.5s06h33m09.4s
Declination+23°19'44.3"+23°45'36.2"
Semi-Diameter 15'43.7" 14'48.4"
Eq. Hor. Parallax 08.6" 0°54'20.3"
Geocentric Libration of Moon
Angle Value
l 2.6°
b -0.5°
c 1.8°
Prediction Paramaters
Paramater Value
Ephemerides JPL DE406
ΔT 752.6 s
k (penumbra) 0.2725076
k (umbra) 0.2722810
Saros Series 104 (41/70)

Explanation of Solar Eclipse Data Tables

Penumbral Shadow Contacts and Extremes: Annular Solar Eclipse of 1191 Jun 23

Contacts of Penumbral Shadow with Earth
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
First External ContactP108:54:29.808:41:57.224°42.4'N051°32.7'W
Last External ContactP414:44:19.514:31:46.908°16.2'N056°02.5'E
Extreme Northern and Southern Path Limits of Penumbra
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
North Extreme Path Limit 1N109:38:26.509:25:53.904°39.0'N053°05.7'W
South Extreme Path Limit 1S114:00:15.913:47:43.311°56.6'S058°13.9'E

Explanation of Penumbral Shadow Contacts and Extremes Tables

Umbral Shadow Contacts and Extremes: Annular Solar Eclipse of 1191 Jun 23

Contacts of Umbral Shadow with Earth
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
First External ContactU110:04:11.409:51:38.833°59.7'N074°25.8'W
First Internal ContactU210:08:47.409:56:14.834°57.0'N076°12.9'W
Last Internal ContactU313:29:59.513:17:26.918°48.4'N079°28.6'E
Last External ContactU413:34:38.513:22:05.917°48.4'N077°49.8'E
Extreme Northern and Southern Path Limits of Umbra
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
North Extreme Path Limit 1N110:07:55.709:55:23.135°26.4'N076°19.9'W
South Extreme Path Limit 1S110:05:04.609:52:32.033°29.7'N074°19.6'W
North Extreme Path Limit 2N213:30:51.913:18:19.319°19.4'N079°30.6'E
South Extreme Path Limit 2S213:33:44.613:21:12.017°16.9'N077°48.2'E

Explanation of Umbral Shadow Contacts and Extremes Tables

Central Line Extremes and Duration: Annular Solar Eclipse of 1191 Jun 23

Extreme Limits of the Central Line
Contact Event Contact Time
TD
Time
UT1
Latitude Longitude
Extreme Central Line Limit 1C110:06:29.009:53:56.434°27.8'N075°18.8'W
Extreme Central Line Limit 2C213:32:19.413:19:46.818°17.8'N078°38.8'E

Explanation of Central Line Extremes Table

Greatest Eclipse and Greatest Duration
Event Time
TD
Time
UT1
Latitude Longitude Sun
Altitude
Sun
Azimuth
Path Width Central
Duration
Greatest Eclipse11:49:21.011:36:48.451°58.2'N010°04.2'E 60.9° 193.3° 192.8 km04m28.39s
Greatest Duration11:44:28.911:31:56.352°29.2'N010°39.5'E 60.7° 186.1° 192.4 km04m28.49s

Explanation of Greatest Eclipse and Greatest Duration

Polynomial Besselian Elements: Annular Solar Eclipse of 1191 Jun 23

Polynomial Besselian Elements
1191 Jun 23 at 12:00:00.0 TD (=t0)
n x y d l1 l2 μ
0 0.16492 0.46316 23.3275 0.56346 0.01722 359.6155
1 0.50383 -0.07975 -0.0021 0.00005 0.00005 14.9992
2 -0.00004 -0.00016 -0.0000 -0.00001 -0.00001 0.0000
3 -0.00001 0.00000 - - - -
Tan ƒ1 0.0045987
Tan ƒ2 0.0045758

At time t1 (decimal hours), each besselian element is evaluated by:

x = x0 + x1*t + x2*t2 + x3*t3 (or x = Σ [xn*tn]; n = 0 to 3)

where: t = t1 - t0 (decimal hours) and t0 = 12.000

Explanation of Polynomial Besselian Elements

Links for the Annular Solar Eclipse of 1191 Jun 23

Links to Additional Solar Eclipse Information

Calendar

The Gregorian calendar (also called the Western calendar) is internationally the most widely used civil calendar. It is named for Pope Gregory XIII, who introduced it in 1582. On this website, the Gregorian calendar is used for all calendar dates from 1582 Oct 15 onwards. Before that date, the Julian calendar is used. For more information on this topic, see Calendar Dates.

The Julian calendar does not include the year 0. Thus the year 1 BCE is followed by the year 1 CE (See: BCE/CE Dating Conventions). This is awkward for arithmetic calculations. Years in this catalog are numbered astronomically and include the year 0. Historians should note there is a difference of one year between astronomical dates and BCE dates. Thus, the astronomical year 0 corresponds to 1 BCE, and astronomical year -1 corresponds to 2 BCE, etc..

Eclipse Predictions

Predictions for the Annular Solar Eclipse of 1191 Jun 23 were generated using the JPL DE406 solar and lunar ephemerides. The lunar coordinates were calculated with respect to the Moon's Center of Mass. The predictions are given in both Terrestrial Dynamical Time (TD) and Universal Time (UT1). The parameter ΔT is used to convert between these two times (i.e., UT1 = TD - ΔT). ΔT has a value of 752.6 seconds for this eclipse.

Acknowledgments

Some of the content on this website is based on the book Thousand Year Canon of Solar Eclipses 1501 to 2500. All eclipse calculations are by Fred Espenak, and he assumes full responsibility for their accuracy.

Permission is granted to reproduce eclipse data when accompanied by a link to this page and an acknowledgment:

"Eclipse Predictions by Fred Espenak, www.EclipseWise.com"

The use of diagrams and maps is permitted provided that they are NOT altered (except for re-sizing) and the embedded credit line is NOT removed or covered.